Bump actions/checkout from 5 to 6 in the github-actions group (#50)

Author: dependabot[bot]

.github/workflows/check.yml

@@ -8,7 +8,7 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup Python 3.12
         uses: actions/setup-python@v6
         with:

.github/workflows/docs.yml

@@ -10,7 +10,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup Python
         uses: actions/setup-python@v6
         with: